Hemi plastic intake boost limit

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well, some cars came with plastic blow off vavles, and some cars came stock with plastic inlet tubing ( not much but I've seen it before). I'm guessing it'd handle 10psi pretty well. anything more than that and I'd want to fiberglass coat it or use an overlay of metal at the attaching bolts with a web of bracing or something, but then you are getting into territory where the stock motor wont handle that much boost I would imagine......Wonder what it would sound like if it blew off at say...20psi :lol:
Now that I think about it, a 24oz Mt Dew bottle will hold 120PSI when chucked up to an air compressor, so who knows. Here's a bump anyway...
 
Never thought of this as an issue. Seems they would be built strong enough to withstand a back fire which would be higher psi than boost. Would gaskets blow out from it distorting. I know nothing about this. Just posting my thoughts as you got my wheels turning.
 
Made many of passes with 12-14 psi and a 125 shot.
 
Yeah. They will hold until they blow apart. That's their limit.
 
player1up said:
well, some cars came with plastic blow off vavles, and some cars came stock with plastic inlet tubing ( not much but I've seen it before). I'm guessing it'd handle 10psi pretty well. anything more than that and I'd want to fiberglass coat it or use an overlay of metal at the attaching bolts with a web of bracing or something, but then you are getting into territory where the stock motor wont handle that much boost I would imagine......Wonder what it would sound like if it blew off at say...20psi :lol:
Now that I think about it, a 24oz Mt Dew bottle will hold 120PSI when chucked up to an air compressor, so who knows. Here's a bump anyway...
Click to expand...
Yea a 1 liter bottle will hold 100psi for a while. After that it's surprisingly loud
 
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